Gibs just out of curiosity. Are those Commodore boards?
None of my Commodore boards, 1D1 (two) and 2B seem to have problems with it or with the ACA1230/56. Edit: Well, one of the 1D1 boards had the clockport on the other side of where it should be, http://eab.abime.net/showpost.php?p=815007&postcount=13
so I would have fried any Delfina just like you did.
Edit: And solder-junky is referred to any of us that aren't professionals. If you see, Jens is still at the level of electricky...lollol